Radiator-tubing



0. BARK.

RADIATOR TUBING.

APPLICATION FILED OCT. 8,19I9.

1,377,385.' Patented. May 10, 1921.

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OTTO BARK, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND ASSIGNMENTS, TO LEAKPROOF RADIATOR CO., OF CHICAGO, ILLINOIS, A CORPORATION.

VRADIATOR-TUBING'.

Specification of Letters Patent.

Patented May 10, 1921.

Application led October 8, 1919. ySeria1 No. 329,394.

T0 all whom it may concern.'

Be it known that I, Ofr'ro BARK, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certa-in new and useful Improvements in Radiator-Tubings, of which the following is a specification.

' The main objects of this invention are to provide an improved construction for reinforcing metal tubing made from thin flexible sheet metal which except for some reinforcing means would be practically incapable of maintaining its. shape; to provide an improved combination of a reinforcing means with the sheet metal from which the tubing is made so as to efficiently stiffen and strengthen the tube; to provide an improved arrangement of this kind for fiat metal tubing for use particularly as radiator construction to be used as a part of the circulating system for gas engines; and to provide for a further strengthening and stiifening of said tube by transversely corrugating the same.

A specific embodiment of this invention is shown in the accompanying drawings, in

which- Figure 1 is a plan of a section of a piece of tubing constructed in accordance with this invention.

Fig. 2 is a side view thereof.

Fig. 3 is an enlarged cross-sectional view taken on the line 3 3 of Fig. 2.

Fig. 4 is a similar cross-sectional view of a modified form of tubing. p

A reduction of this invention to actual practice involves the use of a number of comparatively stiff wires intimately secured in the edges of tubing made up ofcomparatively thin fieXible sheet metal which except for some stiffening and strengthening means would be incapable of sufficiently maintaining its shape to Ypermit very extensive use. The invention is particularly applicable for use in making flat metal tubing to be used for the construction of radiators intended for use as a part of the circulating system for gas engines. In such constructions it is important to have the material from which the tubing is made of as thin construction as possible in order to facilitate the radiation of heat.

In the specic embodiment herein shown, the tubing is made up either of a single sheet of metal l doubled upon itself and secured together by a seam 2, as shown in Fig. 3,7oi` two piecesof metal 3 and 4 secured together along their edges by seams 5 as indicated in Fig. 4. The construction herein illustrated being particularly designed for use in radiator construction, is illustrated in the form of a flat narrow tubing of elongated cross-section.

The reinforcing means by which the tubing is stiffened and strengthened comprises wires 6 intimately secured in the edges 7 and 8 of the tube by having the metal partially embrace said Wires. These wires are preferably of larger diameter than the normal distance between the sides of the tube, so that the metal may be formed around the wire to embrace more than half ofthe periphery. This will insure Vthe wires being retained in proper position.

Where the tubing is of the form shown in Fig. 4, the Wires 6 may be of smallerV diameter than in the modification shown in Fig. 3, for the reason that the seams 5, being at the edges of the tube, constitute a partial reinforcement for the tubing.

In order to make the tubing particularly useful for radiator constructions and incidentally to further strengthen the same, the tubing is preferably transversely crimped or corrugated as clearly shown in the drawings. After the tubing has been completely formed, the seam or seams are soldered so as to make the tubing water-tight. With the modification shown in Fig. 4, this is most easily accomplished by dipping the tube edgewise into solder and holding it long enough to allow the solder to permeate through the seam layers and around they wires. This tends to further strengthen the edges and also permits repairs to be readily made, for if any leak occurs atone of the edges, the application of heat at such point will melt the adjacent solder and cause it to fill the opening.

The tubing is preferably made up in stock lengths, after which it can be out up intol suitable lengths for the formation of radiator structures in some suitable and wel1- known manner. The finished structure will provide an abundance of radiating surface and eliicient cooling of the circulating medium will result.

As will be obvious, other modifications may be made and those shown may be further modified or altered or have details thereof Jmitted without departing from the spirit of this invention as defined by the following claims.

I claim:

l. An article of manufacture of the class described comprising a tube of narrow .obs

long ,crosssection made up of thin flexible sheet-metal, the edges of which are joined by the usual interlocking seam, and stifleningk wires embedded in said tube along the lateral edges thereof.

2. An article of manufacture of the class described, comprising a tube of `narrow oblongcross-section made up of two sheets of thin flexible sheet metal having the edges of one sheet joined to the corresponding edges of 'the other sheet by the usual inter locking seam disposed along the lateral edgQS of said tube, and stiifening wires secured along said lateral edges by having the metal of said tube partially embracing said wires.

3. An article of the class described, coinprising a Hat tube formedof sheet metal,

and stiffening wires extending along the edges thereof for reinforcing the saine, said wires being` secured in place by having the metal of said tube partially embrace said wires, said tubing being transversely cor- Y rugatedl ing two opposed and spaced-apart strips of i sheet `metal seamed together at their edges, and wires extending along the tube adjalcent to said seams and secured in place by bends in the tube, said seams and wires serving to stiften and strengthen saidy tube,

said tube being transversely corrugated.

Signed at Chicago this ith day of October, 1919.

OTTO BAR-K. 

